Lots of web-surfers today are seeing red, but it’s not at all because they’re feeling irritated, angry, or bull-like. Facebook and Twitter have turned red and pink as the Supreme Court discussed whether to overturn Proposition 8.

On the two social media sites, the Human Rights Campaign changed its blue and yellow logo to a red and pink version of the image of an ‘equals’ sign.

“Red is a symbol for love, and that’s what marriage is all about,” Human Rights Campaign spokesperson Charlie Joughin told MSNBC.com. “We wanted to give people an opportunity to show their support for marriage equality in a public and visible way.”

Since the HRC changed its profile picture, the image has spread across the Internet. Many celebrities’ Facebook and Twitter pages now display the red logo, including Private Practice star Kate Walsh, Lance Bass of ‘N Sync, One Tree Hill alum Sophia Bush, Top Chef host Padma Lakshmi, and Star Trek star George Takei (pictured above with his husband, Brad Altman).

Check out some Tweets from celebs who have joined the conversation about marriage equality today: